Equus fraternus (Leidy, 1858) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata class Mammalia order Perissodactyla family Equidae genus Equus species Equus fraternus Name Synonyms Onager fraternus (Leidy, 1858) Tomolabis fraternus (Leidy, 1858) Homonyms Equus fraternus (Leidy, 1858)